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Finding the Fourth Proportional to 292,802.80, 438,232.20 and 212,612.80

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Solution

The fourth proportional to 292,802.80, 438,232.20 and 212,612.80 is: 318,213.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,802.80 : 438,232.20 = 212,612.80 : x
  2. Step 2: Convert to fraction form
    292,802.80/438,232.20 = 212,612.80/x
  3. Step 3: Cross multiply
    292,802.80x = 438,232.20 × 212,612.80
  4. Step 4: Simplify right side
    292,802.80x = 93,173,775,092.16
  5. Step 5: Solve for x
    x = 93,173,775,092.16/292,802.80
  6. Step 6: Final answer
    x = 318,213.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.